| 摘要 |
FIELD: lubricants. ^ SUBSTANCE: invention relates to purification of light- and middle-group mineral oils exhausted during operation of vehicles. After preliminary magnetic separation-mediated removal of suspended solids, centrifugation, and filtration, oil is additionally stirred at 15 to 80 with aqueous solution of reagent at reagent-to-water ratio 1:1 and then settled until full clarification. Reagent contains 60-95% orthophosphoric acid, 4.7-39.7% isopropyl alcohol, and 0.3-10% methyl ethyl ketone. ^ EFFECT: increased degree of purification. ^ 4 ex |
